Search for dissertations about: "host plant choice"

Showing result 1 - 5 of 18 swedish dissertations containing the words host plant choice.

  2. 1. Evolutionary and mechanistic aspects of insect host plant preference

    Author : Alexander Schäpers; Niklas Janz; Steven Heard; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; host plant choice; host range; diet breadth; butterfly; oviposition; specialist; generalist; insect-plant interaction; search behavior; olfaction; decision making; evolution; parasite-host interaction; zoologisk ekologi; Animal Ecology;

    Abstract : Plant feeding insects comprise about 25% of all animal species on earth and play an important role in all ecosystems. Although we understand that their association with plants is a key-factor driving the diversification in this group, we still have large gaps in our knowledge of the underlying processes of this relationship. READ MORE

  4. 2. Life-history consequenses of host plant choice in the comma butterfly

    Author : Lina Söderlind; Sören Nylin; Niklas Janz; Charles W. Fox; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nymphalidae; voltinism; larval performance; Hopkins’ Host Selection Principle; GeneFishing; real-time qPCR; Urtica dioica; Salix cinerea; Betula pubescens; Ulmus glabra; Ribes uva-crispa.; zoologisk ekologi; Animal Ecology;

    Abstract : There is much evidence that herbivory is a key innovation for the tremendous success of insect. In this thesis I have investigated different aspects of host plant utilization and phenotypic plasticity using the polyphagous comma butterfly, Polygonia c-album. READ MORE

  5. 3. Latitudinal patterns in butterfly life history and host plant choice

    Author : Georg Nygren; Sören Nylin; Mark Scriber; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Biologi;

    Abstract : The central subject in this thesis is adaptation of insect populations to different environments along latitudinal gradients. When latitude decreases, the longer favorable season causes an increase in time available for development. However, predictions are complicated by shifts in voltinism. READ MORE

  6. 4. The evolutionary ecology of niche separation : Studies on the sympatric butterflies Leptidea sinapis and Leptidea reali

    Author : Magne Friberg; Wiklund Christer; John N. Thompson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Lepidoptera; ecological character displacement; reproductive isolation; species discrimination; habitat; host plant; life history; sexual selection; female choice; Biology; Biologi; zoologisk ekologi; Animal Ecology;

    Abstract : Studies of ecology and evolution have become largely integrated, and increasing attention is paid to the role of ecology for speciation and post speciation divergence. In this thesis I have applied an in-depth approach studying the ecology of a butterfly species pair; the morphologically virtually identical sister-species, the Wood white (Leptidea sinapis) and Reál’s wood white (Leptidea reali). READ MORE

  7. 5. Small RNAs in Phytophthora infestans and cross-talk with potato

    Author : Sultana Jahan; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Small RNAs (sRNAs) are small non-coding RNAs usually ranging in size 20-30 nt. They are playing important roles in plant-pathogen interactions. This thesis aimed at studying the sRNA populations in potato and Phytophthora infestans and their role in the potato-P. infestans interaction. READ MORE